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Message-ID: <2c9597b90711290650s658a53c8y2fe035021a4fbf40@mail.gmail.com>
Date: Thu, 29 Nov 2007 17:50:34 +0300
From: "Alexei Zakharov" <alexei.zakharov@gmail.com>
To: dev@harmony.apache.org
Subject: Re: [classlib][nio] jetty corrupts big static files
In-Reply-To: <4bebff790711290643m1a626933qf0c1bc86f1d0b207@mail.gmail.com>
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References: <2c9597b90711290606l48fd13bfj240ca335ce067b5a@mail.gmail.com>
	 <4bebff790711290611if824866k76c019f750cba0b@mail.gmail.com>
	 <4bebff790711290612r12123989mae71b4653adbb4c7@mail.gmail.com>
	 <2c9597b90711290640t207fc92du5bc350ed98f23dba@mail.gmail.com>
	 <4bebff790711290643m1a626933qf0c1bc86f1d0b207@mail.gmail.com>

Try it on Linux64, I was able to reproduce it very easily there.

Thanks for doing this,
Alexei

2007/11/29, Aleksey Shipilev <aleksey.shipilev@gmail.com>:
> I have one wild thought about the origin of this issue, so I'm going
> to spend some time for trying.
> BTW, I failed to reproduce the crash even on legacy selector on my
> r588236 workspace, now I'm updating it to more recent one.
>
> Thanks,
> Aleksey.
>
> On Nov 29, 2007 5:40 PM, Alexei Zakharov <alexei.zakharov@gmail.com> wrote:
> > Hi Aleksey,
> >
> > Your provider works better than the default one - VM crash disappears.
> > VM runs into the dead loop instead :) BTW it would be great if you can
> > have a look at it...
> >
> > Thanks,
> > Alexei
> >
> > 2007/11/29, Aleksey Shipilev <aleksey.shipilev@gmail.com>:
> >
> > > Oh sorry, forget it, I should have read JIRA carefully.
> > >
> > > On Nov 29, 2007 5:11 PM, Aleksey Shipilev <aleksey.shipilev@gmail.com> wrote:
> > > > Alexei,
> > > >
> > > > Can you try epoll()-based Selector [1] as fallback? Please specify
> > > > this option on cmdline:
> > > > -Djava.nio.channels.spi.SelectorProvider=org.apache.harmony.nio.internal.EpollSelectorProviderImpl
> > > >
> > > > [1] https://issues.apache.org/jira/browse/HARMONY-4879
> > > >
> > > >
> > > > On Nov 29, 2007 5:06 PM, Alexei Zakharov <alexei.zakharov@gmail.com> wrote:
> > > > > Hi all,
> > > > >
> > > > > If you keep track of CC reports (either at [1] or by reading
> > > > > alerts@harmony.apache.org) then you probably noticed that we have
> > > > > intermittent failures of Jetty scenario on Linux'es for quite long
> > > > > period of time already. I've spent some time on investigation of this
> > > > > failure and found that Jetty-on-Harmony has issues with handling of
> > > > > big static files. In most cases it simply returns corrupted data.
> > > > > However, sometimes it hangs or even crashes. I've put the detailed
> > > > > description of this problem here [2]. In brief I think we have bugs in
> > > > > Harmony implementation of NIO selectors. Jetty works ok if its default
> > > > > SelectChannelConnector is replaced with any other of its connectors
> > > > > like SockerConnector (no NIO) or BlockingChannelConnector (NIO, but no
> > > > > selectors). Stack traces also point to problems somewhere in
> > > > > Java_org_apache_harmony_luni_platform_OSNetworkSystem_selectImpl .
> > > > >
> > > > > IMO such issue is rather critical because it prevents default
> > > > > configuration of Jetty from working correctly on Harmony.
> > > > > Unfortunately I'm not very familiar with NIO code by myself. So I
> > > > > think it would be nice if our NIO experts can take a look at it. And
> > > > > IMO it would be good to have it fixed till M4.
> > > > >
> > > > > [1] http://people.apache.org/~mloenko/snapshot_testing/script/snapshots_summary.html
> > > > > [2] https://issues.apache.org/jira/browse/HARMONY-5219
> > > > >
> > > > > Thanks,
> > > > > Alexei
> > > > >
> > > >
> > >
> >
>